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for an isotropic media you can divide the force on every element in two components.
-bulk component
-rigid component
now bulk component is associated with bulk modulus and other is associated with modulus of rigidity(written as meu).
now bulk component is the one which causes the matter to get compressed and the rigid component only changes the shape of the volume. now, water do not get compressed, it is incompressible and that's why the the force on it is affected by only the rigid component. thats why the modulus of rigidity is zero.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoFluids, such as water, are nearly incompressible, and exhibit a bulk modulus of about 300,000 psi (2 GPa). That means that if confined itis diffuclt to compress. It also means taht poisson ratio is near 0.5, the maximum
For modulus of rigidity and elastic modulus, those values are essentially 0.
Note that if E = elastic modulus and K = bulk modulus, and u = poisson ratio, then
E = 3K(1-2u) = 3K(0) = 0
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Known value of Modulus of Rigidity for Cast Iron?
http://www.engineeringtoolbox.com/modulus-rigidity-d_946.html
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What is meant by rigidity modulus?
modulus of elasticity, E, relates tension stress, s, to strain,e (s = Ee) modulus of rigidity, G, relates shear stress, t, to angular strain, g (t = Gg) modulus of rigidity G is related to E as G = E/2(1+u) whree u = poisson ratio
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What is torsional rigidity of a shaft?
It is defined as ratio of the product of modulus of rigidity and polar moment of inertia to the length of the shaft. Torsional Rigidity is caluclated as: Torsional Rigidity= C J/l
